10... b6c7 Also an only move by Arjun, as the queen needs to hit the h2-pawn as well as the g3-square. 11. a4c5  11... f2h1  12. d2f4 An unfortunate novelty which will not attract followers. Carlsen believes that he has the time to cover his kingside but forgets the opposite wing. 12... c7a5 Ooops...